US6944467B2 - Method and system for routing of short messages in a telecommunication system - Google Patents

Method and system for routing of short messages in a telecommunication system Download PDF

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Publication number
US6944467B2
US6944467B2 US10/207,616 US20761602A US6944467B2 US 6944467 B2 US6944467 B2 US 6944467B2 US 20761602 A US20761602 A US 20761602A US 6944467 B2 US6944467 B2 US 6944467B2
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short message
mobile communication
gateway
communication system
service centre
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US20040005901A1 (en
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Sami Ala-Luukko
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Sonera Oy
Intellectual Ventures I LLC
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Sonera Oy
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/18—Service support devices; Network management devices
    • H04W88/184—Messaging devices, e.g. message centre

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  • the present invention relates to telecommunication systems and, in particular, to a method and system for transmitting short messages between mobile communication systems which are based on different mobile communication standards.
  • SMS short message service
  • the short message service is in actuality a radio paging system in which alphanumeric messages may be transmitted to the mobile subscriber, who can then read these messages on the subscriber's mobile station display whenever the subscriber wishes to do so.
  • the transmission of short messages in the various different systems and protocols in use throughout the world is very similar, but these various implementations are nevertheless not wholly compatible. This has caused a particularly disadvantageous situation that results in significant difficulties and impediments when one wishes to send a short message between mobile communication systems that are based on different standards.
  • roaming is generally used to denote the co-operation of system operators through which the user of a mobile station is able to establish a connection in a wider area than just that user's own operator can offer.
  • system operators involved must agree with each other on the administration of inter-system roaming and adapt their systems to the technical and operating requirements necessary to effect the desired communication and co-operation between their respective systems.
  • the present invention enables the availability of roaming functionality between different mobile communication systems that are based on different mobile communication standards through the use of a separate or distinct component, and more particularly as herein disclosed by way of preferred example a gateway.
  • the gateway implements and provides features and functionality that the standard components of a mobile communication network do not generally include.
  • the invention thereby enables a subscriber or user of a mobile communication system based on one mobile communication standard to send a short message to a subscriber or user of another mobile communication system based on a different mobile communication standard.
  • a telecommunication system in accordance with the invention comprises a first mobile communication system that is based on a first mobile communication standard, a first short message service centre, a second mobile communication system based on a second mobile communication standard, a second short message service centre, a home location register, a mobile services switching centre, and a gateway through which the first and second mobile communication systems can communicate.
  • gateway is intended to denote, in the context of the preferred embodiments of the invention herein described, an SMS roaming gateway or other corresponding network element that functions as the transmitter or communications enabler between two mobile communication systems based on different communication standards.
  • a short message is created on a terminal device of the first mobile communication system and is directed from that terminal device to the first mobile communication system.
  • a routing data query for obtaining address information necessary for routing of the short message to its intended recipient is sent or presented to the gateway.
  • the gateway responds to that query with the address of the routing gateway, based on which the short message may then be sent from the first short message service centre to the routing gateway for further transmission to the second mobile communication system.
  • the purpose of the routing data query is to locate the intended recipient subscriber in the coverage area of another (i.e. a second) mobile communication system.
  • the gateway may already know the location of the intended recipient subscriber, in which case the first short message service centre will directly receive the necessary routing data in the gateway's response that includes the address of the gateway. This circumstance will arise where the system operator has configured the network so that one or more numbers of the short message service centre of the second mobile communication system for a particular numerical address space have been stored by the first short message service centre. Because of the resulting redundancy it is usually more preferable to use several numbers.
  • This practice based on a predetermined numerical address space of another system's short message service centre may be employed to implement, by way of example, the ability to always provide for transmission of short messages intended for a subscriber of a particular operator directly to the short message service centre of that particular operator.
  • the store-and-forward functionality that is characteristic of a short message i.e. the process for handling of short messages when the mobile station of the intended recipient is not currently connected to the network or is otherwise unavailable for immediate receipt of the short message—is in such cases implemented in the short message service centre of the second mobile communication system.
  • the short message of the sender is temporarily saved to the short message service centre of the first system, from which it is thereafter sent to the intended recipient after a further period of time has elapsed.
  • the gateway may also determine the location of the intended recipient subscriber from the home location register of the other or second mobile communication system, following which the gateway stores the determined address to its database and then returns its own address in response to the routing data query received from the first short message service centre.
  • the routing query from the first short message service centre i.e. the HLR query
  • the gateway is transformed in the gateway into an HLR query that conforms to the second mobile communication standard, and the transformed query is then directed to the home location register of the second mobile communication system.
  • the query need not necessarily be an HLR query; a different from of query may be employed as a function of the configuration or requirements or practice of the particular network.
  • the purpose of the query is to locate the intended recipient mobile station in the coverage area of another mobile communication system.
  • the transformed query is received by the home location register of the second mobile communication system, and the address of the second mobile services switching centre that currently serves the mobile station of the second mobile communication system is then returned in a response to the gateway.
  • the address in that response is next transformed in the gateway to conform to the address format or the like used by the first mobile communication system, and is then sent to the short message service centre of the first mobile communication system.
  • the short message is sent from the first short message service centre to the gateway where it is transformed to conform to the second mobile communication standard, and the so-transformed short message is then transmitted from the gateway to the short message service centre of the second mobile communication system; alternatively, the transformed short message is transmitted from the gateway to the mobile services switching centre of the second mobile communication system.
  • An acknowledgement of transmission of the transformed short message is then sent from the short message service centre of the second mobile communication system (or from the mobile services switching centre of the second system) to the gateway.
  • the acknowledgement must be similarly transformed in the gateway to conform to the communication standard of the first mobile communication system, after which the transformed acknowledgement is directed from the gateway to the first short message service centre.
  • the short message is modified from the Mobile-Terminating format to a Mobile-Originated format.
  • This kind of service may be received by all mobile stations capable of its receipt, and it is for that reason that the transformation of the short message from the Mobile-Terminating to a Mobile-Originated format is effected.
  • the present invention additionally provides a system for transmitting short messages between mobile communication systems in a telecommunication system comprising a first mobile communication system based on a first mobile communication standard, a first short message service centre of or connected to the first mobile communication system; a second mobile communication system based on a second mobile communication standard, a second short message service centre of or connected to the second mobile communication system, a home location register of or connected to the second mobile communication system, a mobile services switching centre of or connected to the second mobile communication system, and a gateway for receiving, transmitting and routing communications to and between the first and second mobile communication systems.
  • the telecommunication system further includes a routing component operable for processing a routing data query from the first short message service centre.
  • the short message is transmitted, based on a response to the routing data query, to the second mobile communication system.
  • a pointer is used to address to the gateway the routing data queries addressed to a predetermined numerical space, and a returner is used to return the address of the gateway to the first short message service centre.
  • the inventive system also includes a transformer operable for transforming, in the gateway, the HLR query from the first short message service centre into an HLR query that conforms to the second mobile communication standard, and for additionally transforming in the gateway—from the standard of the second to the standard of the first mobile communication system—the address that is returned in response to that query and that identifies the second mobile communication system mobile services switching centre that is handling the mobile station which is the intended recipient of the short message.
  • the address of the gateway is attached or appended to the transformed response.
  • a transformer disposed in the gateway is used to additionally transform the short message to be transmitted to the second mobile communication system so that it conforms to the second mobile communication standard, and to transform the acknowledgement received to confirm the transmission of the short message so that it conforms to the standard of the first mobile communication system.
  • the acknowledgement may, by way of example, comprise a brief informative message to the originating sender of the short message.
  • a temporary database that stores information about the mobile services switching centre of one or more subscribers of another mobile communication system, such as the address of the mobile services switching centre in whose coverage area the intended recipient subscriber is currently—i.e. at the time of the routing data query—located.
  • One way to implement this database is by maintaining a temporary subscriber-specific database that holds information about the current mobile services switching centre of the subscriber for a sufficient period to time to effect delivery of the short message.
  • Another implementation of the invention returns information in the address field that unambiguously identifies the transaction, such as the address to which the short message service centre sends the short message. In this manner, from the point of view of the gateway two independent transactions between the home location register of the first mobile communication system and the gateway may be unambiguously correlated.
  • the present invention advantageously renders it possible to transmit short messages between mobile stations of mobile communication systems based on different standards. Although the transmission of short messages in systems using different standards is actually effected in a similar manner, these different implementations are nevertheless incompatible.
  • the present invention overcomes this incompatibility and thereby implements roaming functionality for short messages between mobile communication systems which are based on different communication standards.
  • FIG. 1 is a schematic block diagram of a telecommunication system in accordance with the invention.
  • FIG. 2 is a signalling diagram for a first embodiment of a method in accordance with the invention.
  • FIG. 3 is a signalling diagram for a second embodiment of a method in accordance with the invention.
  • FIG. 1 A telecommunication system constructed and configured in accordance with the present invention is shown in FIG. 1 .
  • That telecommunication system is comprised of a multiplicity of elements and components and includes a first mobile communication system MSN 1 , a first short message service centre SMSC 1 , a gateway GW, a second mobile communication system MSN 2 , a home location register HLR, a second short message service centre SMSC 2 , and a mobile services switching centre MSC.
  • the first mobile communication system may be, way of illustrative example, a system consistent with the GSM standard and that is operable to carry out the normal operations and functionality of a mobile communication network.
  • a router 1 of the first short message service centre SMSC 1 is operable to initiate a routing data query directed to the gateway GW, based on a predetermined numerical space in which there are one or more numbers of the second short message service centre SMSC 2 that correspond to a specific numerical space of the second mobile communication system mobile communication standard.
  • the first short message service centre SMSC 1 is also operable to receive, from the gateway GW, a response to the query which includes the address of the gateway and based on which response the short message is then transmitted to the identified gateway for subsequent further transmission to the second mobile communication system MSN 2 .
  • the first short message service centre SMSC 1 additionally receives an acknowledgement of transmission of the short message for subsequent retransmission therefrom.
  • the gateway GW is responsible for implementing and arranging the short message roaming functionality—i.e. the gateway functions as a connective component between systems or devices or components that use different mobile communication standards.
  • the gateway GW includes a query returner 3 for returning its own address in response to an HLR query sent from the first short message service centre SMSC 1 . Since the HLR query is initiated on the basis of the subscriber number—thus in a GSM system the query is based on the MSISDN—a system operator will in accordance with the invention have configured the network so that HLR queries and the like directed to a predetermined subscriber numerical space of a system using another standard, as for example an ANSI 41 operator, are routed to the gateway GW.
  • the gateway GW further includes a transformer 4 operable for transforming the HLR query from the first short message service centre SMSC 1 into a query that conforms to the communication standard of the second mobile communication system MSN 2 .
  • the transformer is also used to transform the address of the mobile services switching centre MSC of the second mobile communication system MNS 2 , which address is received by the gateway in response to the query, to conform to the communication standard of the first mobile communication system MSN 1 , and the short message that is to be sent from the first communication system MSN 1 is transformed to conform to the mobile communication standard of the second communication system MSN 2 .
  • the settings for the GSM format will be set to conform to the settings for the ANSI 41 format.
  • the transformer 4 of the gateway GW also transforms the short message transmission acknowledgement received from the second short message service centre SMSC 2 or the mobile services switching centre to conform to the communication standard of the first mobile communication system MSN 1 .
  • the gateway GW further includes a database 5 that stores information concerning the mobile services switching centre MSC of the second mobile communication system MSN 2 .
  • the database 5 of the gateway is used to store the address of the mobile services switching centre in whose coverage area the subscriber is currently—i.e. at the time of the query—located.
  • the second mobile communication system MSN 2 may, by way of illustrative example, be a mobile communication system consistent with the ANSI 41 standard and that is operative to implement and carry out the normal functionality of a mobile communication network under that standard.
  • the HLR queries emanating or otherwise transmitted from the gateway are received by the home location register HLR.
  • the address of the mobile services switching centre MSC of the intended recipient subscriber of the second mobile communication system MSN 2 is attached as an item of routing data.
  • An acknowledgement of the transmission of the short message to the gateway GW is transmitted either from the mobile services switching centre MSC of the second mobile communication system MSN 2 , or from the second short message service centre SMSC 2 .
  • FIG. 2 depicts a signalling diagram in accordance with one advantageous embodiment of the invention.
  • the first short message service centre SMSC 1 initiates a routing data query based on the subscriber number (step 31 ).
  • the gateway GW receives the query and attaches to its response the address of the gateway (step 32 ); in prior art systems, on the other hand, the home location register HLR returns the address of the mobile services switching centre MSC in whose coverage area the subscriber is currently located.
  • the short message service centre SMSC 1 of the first mobile communication system MSN 1 sends the short message to the gateway GW (step 33 ).
  • the gateway receives the short message and transforms it to conform to the MSN 2 standard of the second mobile communication system, as for example the ANSI 41 standard (step 34 ). In this transformation the short message is at the same time transformed from the Mobile-Terminated format into a Mobile-Originated format so that the second short message service centre SMSC 2 receiving the message can properly handle it.
  • the transformed short message is directed to the short message service centre SMSC 2 of the second mobile communication system MSN 2 (step 35 ), from which it is thereafter to be further transmitted. It is most reasonable and efficient to configure the address of the short message service centre SMSC 2 of the second mobile communication system MSN 2 in a subscriber-specific way, i.e. so that there are one or more numbers of the short message service centre SMSC 2 of the second mobile communication system MSN 2 for a specific numerical space.
  • This arrangement may advantageously be employed to implement functionality by which the short messages of a subscriber of a particular system operator are always transmitted to the short message service centre of the relevant other system operator.
  • the short message store-and-forward functionality in such an arrangement is implemented in the short message service centre SMSC 2 of a second mobile communication system, such for example an ANSI 41 operator.
  • a second mobile communication system such for example an ANSI 41 operator.
  • the operator of the second (e.g. ANSI 41 ) mobile communication system MSN 2 must allow the clients of the first or other (e.g. GSM) system operator to use the short message service centre of the second system MSN 2 ; in prior art systems, on the other hand, only a system operator's own clients can use the short message service centre of that operator.
  • An acknowledgement of transmission of the short message is then sent from the short message service centre SMSC 2 of the second mobile communication system MSN 2 (step 36 ).
  • This acknowledgement is transformed in the gateway GW to conform to the standard of the first mobile communication system MSN 1 (step 37 ), and is then sent to and received by the first short message service centre SMSC 1 (step 38 ) for subsequent transmission therefrom.
  • FIG. 3 depicts a signalling diagram in accordance with another advantageous embodiment or implementation of the invention.
  • an HLR query is sent from the short message service centre SMSC 1 of the first mobile communication system MSN 1 to the gateway GW (step 41 ). That query is then transformed by the transformer of the gateway to conform to the second mobile communication standard (step 42 ), and is directed from the gateway GW to the home location register HLR of the second mobile communication system MSN 2 (step 43 ).
  • the address of the mobile services switching centre MSC of the subscriber is attached to the received response which is then returned to the gateway GW (step 44 ).
  • the attached address is transformed to conform to the standard of the first mobile communication system MSN 1 (step 45 ), and is then sent to the first short message service centre SMSC 1 with the address of the gateway (step 46 ).
  • the short message may be transmitted from the first short message service centre SMSC 1 to the gateway GW (step 47 ).
  • the short message is transformed to conform to the second communication system standard (e.g. ANSI 41 ) (step 48 ).
  • the gateway GW then utilizes its own database and returns from that database the address of the mobile services switching centre MSC in whose coverage area the intended recipient subscriber was located at the time of the HLR query.
  • a saved or stored piece of data may be correlated to a received short message.
  • One such method is to maintain a temporary subscriber-specific database that retains information about the mobile services switching centre MSC of the intended recipient subscriber for a sufficient period of time to permit delivery of the message.
  • Another is to return, as for example in the address field of a response message to an HLR query, information which unambiguously identifies the transaction.
  • address is intended to connote the address to which the first short message service centre SMSC 1 sends the short message.
  • the gateway GW When the gateway GW has completed its transformation of the short message to conform to the communication standard of the second mobile communication system MSN 2 , the transformed short message is sent to the mobile services switching centre MSC of the second mobile communication system (step 49 ). An acknowledgement of transmission of the short message is then sent from the mobile services switching centre MSC to the gateway (step 50 ), where it is transformed to conform to the communication standard of the first mobile communication system MSN 1 and then directed to the first short message service centre SMSC 1 (step 51 ) for further transmission therefrom.

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US11/195,518 US7640029B2 (en) 2000-01-27 2005-08-01 Method and system for routing of short messages in a telecommunication system
US12/634,294 US8180383B2 (en) 2000-01-27 2009-12-09 Method and system for routing of short messages in a telecommunication system

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FI20000164A FI110982B (fi) 2000-01-27 2000-01-27 Lyhytsanomien välittäminen tietoliikennejärjestelmässä
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PCT/FI2001/000074 WO2001056311A1 (en) 2000-01-27 2001-01-26 Routing of short messages in a telecommunication system
WOPCT/FI01/00074 2001-01-26

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FI20000164L (fi) 2001-07-28
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ATE257307T1 (de) 2004-01-15
EP1250820B1 (de) 2004-01-02
FI110982B (fi) 2003-04-30
US7640029B2 (en) 2009-12-29
US20100087171A1 (en) 2010-04-08
DE60101671D1 (de) 2004-02-05
FI20000164A0 (fi) 2000-01-27
US8180383B2 (en) 2012-05-15
AU3179101A (en) 2001-08-07
ES2213687T3 (es) 2004-09-01
DE60101671T2 (de) 2004-10-21
US20040005901A1 (en) 2004-01-08
EP1250820A1 (de) 2002-10-23
US20050282567A1 (en) 2005-12-22

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